Forget about 3D TV -- this year's Consumer Electronics Show was all about 4K.

Sony got the ball rolling with the unveiling of new 55-inch and 65-inch 4K TVs, as well as the world's first 4K video distribution service, which offers native 4K movies from Sony Pictures and other 4K content creators. Additionally, the company also said it would be selling "4K mastered" Blu-ray discs this summer; they'll be standard 1080p resolution (not 4K), but supposedly look better than traditional Blu-rays.

The electronics giant unveiled a prototype 4K OLED TV at 56 inches, although little was said about it. Meanwhile, Panasonic displayed its own 4K OLED screen, which it claims is the world's biggest at less than half an inch thick. Panasonic also showed off a 4K tablet prototype that boasted a ridiculous 3,840x2,560-pixel resolution and 230 pixels per inch packed into a 20-inch IPS LED-backlit LCD display.